Tontti

import java.util.ArrayList;
import java.util.HashMap;
public class Main {
    private int trees;
    private int hits;
    private HashMap<Integer,ArrayList<String>> woods;
    
    public void main(String[] args) {
        IO io = new IO();
        int height = io.nextInt();
        int width = io.nextInt();
        trees = io.nextInt();
        hits = 0;
        
        woods = new HashMap<>();
      
        for (int i = 1; i <= height; i++) {
            ArrayList<String> temp = new ArrayList<>();
            for (int j = 0; j < width; j++) {
                temp.add(io.next());
            }
            woods.put(i, temp);
        }
        int smallest = height;
        if (height > width) {
            smallest = width;
        }
        iterateThroughAllSquares(width,height,smallest);

        
        io.println(hits);
        io.close();
    }
    private void searchSquare(int startx, int starty, int size) {
        int temphits = 0;
        for (int i = startx; i < size; i++) {
            for (int j = starty; j < size; j++) {
                if (woods.get(j).get(i).equals('*')) {
                    temphits++;
                }
            }
        }
        if (temphits==trees) {
            hits++;
        }
    }
    //in this function, the grid starts from 0,0 in the left upper corner
    private void iterateThroughAllSquares(int width, int height, int size) {
        for (int i = 0; i <= width-size; i++) {
            for (int j = 0; j <= height-size; j++) {
                searchSquare(i, j, size);
                
            }
        }
        //calls itself here
        if (size*size >= trees) {
            iterateThroughAllSquares(width, height, size-1);
        }
    }
}

Test 1

Group: 1

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 2

Group: 1

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 3

Group: 1

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 4

Group: 1

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 5

Group: 1

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 6

Group: 2

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 7

Group: 2

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 8

Group: 2

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 9

Group: 2

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 10

Group: 2

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 11

Group: 3

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 12

Group: 3

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 13

Group: 3

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 14

Group: 3

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)

Test 15

Group: 3

Verdict: RUNTIME ERROR

Error: Main method is not static in class Main, please define the main method as:
   public static void main(String[] args)